Suitable for all air connection nipples. Safe disconnection of the connection (unwanted disconnection is excluded). No risk of injury from hose impact. Safety coupling depressurizes the connection before decoupling. One-hand operation. Little effort during coupling and decoupling. Omission of loud popping during coupling process. Easy operation, even with gloves. 9000-050 up to 070 brass, nickel-plated. Surface: nickel-plated. Inside thread (IG) 1.1 mm / 3/8". Net weight: 0.1 kg.